Connecter for incandescent lamps



Patented Dc 25, 1928.

UNITED STATES GEORG FRIEDECH.BECKR{ OF B EMEN, GERMANY.

coNxicrna. roB mcaivnnscnnr LAMES.

Application filed Deember 29, 1927, Serial No. 243,356, and in GermanyMay 25, 192 6.

. This invention relates to allamp connecter of novel construction for 1llumniatlng de vices of that type employing double endedincandescent lan1ps arranged in longitudinal alinement, the object of the invention being to provide interchangeable connecters for telescopically coupling the lamps so that they can he easilyassembled andsepar2id, and

which connecters also provide means'wherebythe filaments of the lamps inay be connected in parallel in a simple and reliable manner.

Numerous embodiments of the invention are possible, three of thesame being illustrated, by way of example,in the accompai ly-' ing drawing, in which Fig. 1 show s'an illuminxtin device emin of slightly modified form.-

ig. 3 is a cross-sectionon'line II o-f Fig. 2.. A

' Fig. 4 is a view similar to Fig. 2, showing another forxnof construction of connecter.

Fig. 5 is a cro-sectitm of Fig. 4.

In an ou'ter casing tube a of transparent or translucent glass a. serieS of double-ended incandescent lampS 6, are arra11gedand jo ined by connecting elements d, c, -c 0 'ch lamp having end terminals t0 whitzh its filament is conductively cnhected. The connect'ers a, c c, 0 are oflike construction and interchangeable, and each-is made of'a suitable condu-cting metal and is bOred to form a socket to telescopically receive the adjacent terminals of two longitudinally alined lafnps.

- Each connecter is provided at (me side with a tubular bead 6 in cOnducting connection with the body thereof and at its diametri cally opposite side*with a similar bead e in wh ich is fittd and suitably held an insulating sleeve ofglass or other good non-conductingj material. The bea-d e is provided either with a s1ngle bmd1ng screw 6 as shown in Figune 1, or with a pair-cf binding screws. as shown in Figures 2 and 4. for clampgelectr1c conductmg w1res to the connectera Theuse of a pan of bmdmg screws 18 of advan tag in afiording greater convenience in the: binding of 'sectional. conducting wiree, Whenu sch are employed.

The casing tube ais clsed atits ends by removable'dsks-or heads h, and thse ,heads re5ptively carry binding posts to which are view on:

connected the positive and negative' wires c and 7.7, respectively, of an electric current supply system. 'lh positive conductor 71 1s connected to a feed conductor f arranged witliin the casing tube a and tliis c'onductor 7 is fittcd in the beads e of the connecter-s c and 0 and -is fastened thereto by the set screw or set screws thereof, and passes intermediately through the insulating tube of the bead 6 of the connecter (2, whereb said conduotor f is not electrically. connecited with the connecter 0 and 0 but simply through and is insulated from the. connecter o The conductor f is'thuselectficall connected with the upper conducting terminal and filament of the lamp 6, for the downward flow of current through said filament, and is ele0trically connected by the connect r 0 to the lower co11ducting terminal of e mid dle lampand upper conducting terminal of the lower lamp for the upward fiow of 6111- *rent through the filament of the middle lamp and downward fiow of currnt through the filament of the lower. lamp, the filaments of all the lampe being thus sup plied with current from the feed conductor.

Another orreturn oonduotor is arranged within the casing tube a and electrically connected at its lower end with the negativecontherein by the set screw or set screws thereof, and passes through the insulating sleeve g of the bead .9 of connecter (2 Current thus passes to this conductor from the fila- "advantage is obtained that, although they are parallel-connected, they may be directly connected to the connecting'elements.

In the form of construction shown in Figs.'gi and 5 the connecting element 0 is constructed to provide open forks or clips l be tween the arms of which the terminals of the tubular lamps are clamped. For positively supporting the tubular lamps in the glass casing tube, the connecting elements 0 have resilient arms n and one or more beang extensions b to engage the casing tube, so that the connecting elements will be suppord in the casing tube.at three or more points agaiast oscillating movexnent.

ductor 76 and thence extends through the beads 6 of connecters c"and c,.and is clamped ment et lamp b through connecter c, and

1 claim:

1. A connecter for elongated incandescent lamps of that type having a filament terminal at each end thereof comprising a body of condueting materialformed with a soeket' eally oppst& side a conductor wire receiving bead having a surfabe for lec:tfically insulating the wire therefrom.

2. A connecferfor elongated incandescent lamps of that t pe having a filament terminal at each en thereof comprising a body of conducting material formed with a socket to receive the adjacent tenninals-of two 10ngitudinally alined lamps, said body having at one side ofSaid soeket a conduetor wire reeeiving bead in eleetrical conductivty with the body and provided with wre securing means and said body having at its diametrically opposite side a conductor Wire receiving bead having a tube of non-conducting material fitted therein for electrically insu- ]ating the wire therefrom.

In testimon whereof I afiix my signature.

GEOR FRIEDRICH BECKER. 

